1 /*-
2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/6.3/sys/i386/acpica/acpi_wakeup.c 161345 2006-08-16 04:01:49Z njl $");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/lock.h>
36 #include <sys/proc.h>
37 #include <sys/sysctl.h>
38
39 #include <vm/vm.h>
40 #include <vm/pmap.h>
41 #include <vm/vm_object.h>
42 #include <vm/vm_page.h>
43 #include <vm/vm_map.h>
44
45 #include <machine/bus.h>
46 #include <machine/cpufunc.h>
47 #include <machine/intr_machdep.h>
48 #include <machine/segments.h>
49
50 #include <contrib/dev/acpica/acpi.h>
51 #include <dev/acpica/acpivar.h>
52
53 #include "acpi_wakecode.h"
54
55 /* Make sure the code is less than one page and leave room for the stack. */
56 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
57
58 #ifndef _SYS_CDEFS_H_
59 #error this file needs sys/cdefs.h as a prerequisite
60 #endif
61
62 extern uint32_t acpi_resume_beep;
63 extern uint32_t acpi_reset_video;
64 extern void initializecpu(void);
65
66 static struct region_descriptor saved_idt, saved_gdt, *p_gdt;
67 static uint16_t saved_ldt;
68
69 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
70 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
71
72 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
73 static uint32_t r_esp;
74
75 static void acpi_printcpu(void);
76 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
77 int nsegs, int error);
78 static void acpi_alloc_wakeup_handler(void);
79
80 /* XXX shut gcc up */
81 extern int acpi_savecpu(void);
82 extern int acpi_restorecpu(void);
83
84 #ifdef __GNUCLIKE_ASM
85 __asm__(" \n\
86 .text \n\
87 .p2align 2, 0x90 \n\
88 .type acpi_restorecpu, @function\n\
89 acpi_restorecpu: \n\
90 .align 4 \n\
91 movl r_eax,%eax \n\
92 movl r_ebx,%ebx \n\
93 movl r_ecx,%ecx \n\
94 movl r_edx,%edx \n\
95 movl r_ebp,%ebp \n\
96 movl r_esi,%esi \n\
97 movl r_edi,%edi \n\
98 movl r_esp,%esp \n\
99 \n\
100 pushl r_efl \n\
101 popfl \n\
102 \n\
103 movl ret_addr,%eax \n\
104 movl %eax,(%esp) \n\
105 xorl %eax,%eax \n\
106 ret \n\
107 \n\
108 .text \n\
109 .p2align 2, 0x90 \n\
110 .type acpi_savecpu, @function \n\
111 acpi_savecpu: \n\
112 movw %cs,r_cs \n\
113 movw %ds,r_ds \n\
114 movw %es,r_es \n\
115 movw %fs,r_fs \n\
116 movw %gs,r_gs \n\
117 movw %ss,r_ss \n\
118 \n\
119 movl %eax,r_eax \n\
120 movl %ebx,r_ebx \n\
121 movl %ecx,r_ecx \n\
122 movl %edx,r_edx \n\
123 movl %ebp,r_ebp \n\
124 movl %esi,r_esi \n\
125 movl %edi,r_edi \n\
126 \n\
127 movl %cr0,%eax \n\
128 movl %eax,r_cr0 \n\
129 movl %cr2,%eax \n\
130 movl %eax,r_cr2 \n\
131 movl %cr3,%eax \n\
132 movl %eax,r_cr3 \n\
133 movl %cr4,%eax \n\
134 movl %eax,r_cr4 \n\
135 \n\
136 pushfl \n\
137 popl r_efl \n\
138 \n\
139 movl %esp,r_esp \n\
140 \n\
141 sgdt saved_gdt \n\
142 sidt saved_idt \n\
143 sldt saved_ldt \n\
144 str r_tr \n\
145 \n\
146 movl (%esp),%eax \n\
147 movl %eax,ret_addr \n\
148 movl $1,%eax \n\
149 ret \n\
150 ");
151 #endif /* __GNUCLIKE_ASM */
152
153 static void
154 acpi_printcpu(void)
155 {
156 printf("======== acpi_printcpu() debug dump ========\n");
157 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
158 saved_gdt.rd_limit, saved_gdt.rd_base,
159 saved_idt.rd_limit, saved_idt.rd_base,
160 saved_ldt, r_tr, r_efl);
161 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
162 r_eax, r_ebx, r_ecx, r_edx);
163 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
164 r_esi, r_edi, r_ebp, r_esp);
165 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
166 r_cr0, r_cr2, r_cr3, r_cr4);
167 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
168 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
169 }
170
171 #define WAKECODE_FIXUP(offset, type, val) do { \
172 type *addr; \
173 addr = (type *)(sc->acpi_wakeaddr + offset); \
174 *addr = val; \
175 } while (0)
176
177 #define WAKECODE_BCOPY(offset, type, val) do { \
178 void *addr; \
179 addr = (void *)(sc->acpi_wakeaddr + offset); \
180 bcopy(&(val), addr, sizeof(type)); \
181 } while (0)
182
183 /* Turn off bits 1&2 of the PIT, stopping the beep. */
184 static void
185 acpi_stop_beep(void *arg)
186 {
187 outb(0x61, inb(0x61) & ~0x3);
188 }
189
190 int
191 acpi_sleep_machdep(struct acpi_softc *sc, int state)
192 {
193 ACPI_STATUS status;
194 struct pmap *pm;
195 vm_page_t page;
196 int ret;
197 uint32_t cr3;
198 u_long ef;
199 struct proc *p;
200
201 ret = 0;
202 if (sc->acpi_wakeaddr == 0)
203 return (0);
204
205 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
206
207 ef = read_eflags();
208
209 /* Create Identity Mapping */
210 if ((p = curproc) == NULL)
211 p = &proc0;
212 pm = vmspace_pmap(p->p_vmspace);
213 cr3 = rcr3();
214 #ifdef PAE
215 load_cr3(vtophys(pm->pm_pdpt));
216 #else
217 load_cr3(vtophys(pm->pm_pdir));
218 #endif
219
220 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
221 pmap_enter(pm, sc->acpi_wakephys, page,
222 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
223
224 ret_addr = 0;
225 ACPI_DISABLE_IRQS();
226 if (acpi_savecpu()) {
227 /* Execute Sleep */
228 intr_suspend();
229
230 p_gdt = (struct region_descriptor *)
231 (sc->acpi_wakeaddr + physical_gdt);
232 p_gdt->rd_limit = saved_gdt.rd_limit;
233 p_gdt->rd_base = vtophys(saved_gdt.rd_base);
234
235 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
236 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
237 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
238 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
239 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
240
241 WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
242 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
243
244 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
245 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt);
246 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt);
247 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt);
248
249 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
250
251 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
252 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
253 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
254 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
255 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
256
257 if (bootverbose)
258 acpi_printcpu();
259
260 /* Call ACPICA to enter the desired sleep state */
261 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
262 status = AcpiEnterSleepStateS4bios();
263 else
264 status = AcpiEnterSleepState(state);
265
266 if (status != AE_OK) {
267 device_printf(sc->acpi_dev,
268 "AcpiEnterSleepState failed - %s\n",
269 AcpiFormatException(status));
270 ret = -1;
271 goto out;
272 }
273
274 for (;;) ;
275 } else {
276 /* Execute Wakeup */
277 intr_resume();
278
279 if (bootverbose) {
280 acpi_savecpu();
281 acpi_printcpu();
282 }
283 }
284
285 out:
286 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
287 load_cr3(cr3);
288 write_eflags(ef);
289
290 /* If we beeped, turn it off after a delay. */
291 if (acpi_resume_beep)
292 timeout(acpi_stop_beep, NULL, 3 * hz);
293
294 return (ret);
295 }
296
297 static bus_dma_tag_t acpi_waketag;
298 static bus_dmamap_t acpi_wakemap;
299 static vm_offset_t acpi_wakeaddr;
300
301 static void
302 acpi_alloc_wakeup_handler(void)
303 {
304 void *wakeaddr;
305
306 if (!cold)
307 return;
308
309 /*
310 * Specify the region for our wakeup code. We want it in the low 1 MB
311 * region, excluding video memory and above (0xa0000). We ask for
312 * it to be page-aligned, just to be safe.
313 */
314 if (bus_dma_tag_create(/*parent*/ NULL,
315 /*alignment*/ PAGE_SIZE, /*no boundary*/ 0,
316 /*lowaddr*/ 0x9ffff, /*highaddr*/ BUS_SPACE_MAXADDR, NULL, NULL,
317 /*maxsize*/ PAGE_SIZE, /*segments*/ 1, /*maxsegsize*/ PAGE_SIZE,
318 0, busdma_lock_mutex, &Giant, &acpi_waketag) != 0) {
319 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
320 return;
321 }
322 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, BUS_DMA_NOWAIT,
323 &acpi_wakemap) != 0) {
324 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
325 return;
326 }
327 acpi_wakeaddr = (vm_offset_t)wakeaddr;
328 }
329
330 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
331
332 static void
333 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
334 {
335 struct acpi_softc *sc;
336 uint32_t *addr;
337
338 /* Overwrite the ljmp target with the real address */
339 sc = arg;
340 sc->acpi_wakephys = segs[0].ds_addr;
341 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
342 *addr = sc->acpi_wakephys + wakeup_32;
343
344 /* Copy the wake code into our low page and save its physical addr. */
345 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
346 if (bootverbose) {
347 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
348 acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
349 }
350 }
351
352 void
353 acpi_install_wakeup_handler(struct acpi_softc *sc)
354 {
355 if (acpi_wakeaddr == 0)
356 return;
357
358 sc->acpi_waketag = acpi_waketag;
359 sc->acpi_wakeaddr = acpi_wakeaddr;
360 sc->acpi_wakemap = acpi_wakemap;
361
362 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
363 (void *)sc->acpi_wakeaddr, PAGE_SIZE, acpi_realmodeinst, sc, 0);
364 }
Cache object: f59cb3bccc34e93abb0e0149b4bbde7b
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